E. Answer these questions.
1. What are the main parts of human circulatory
system? Como
2. Describe the functions of blood in short.
3. What is ABO blood group system? Who
discovered it?
4. What is heartbeat? Why does the heart make
lub-dub sounds?
5. How is oxygen transported by blood in
animals? becool cells transport
6. What are the ways for keeping the heart
healthy?
Answers
Answer:
1.The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic).
2.Blood Provides the Body's Cells with Oxygen and Removes Carbon Dioxide. Blood absorbs oxygen from air in the lungs. It transports the oxygen to cells throughout the body, and it removes waste carbon dioxide from the cells.
3.ABO blood group system, the classification of human blood based on the inherited properties of red blood cells (erythrocytes) as determined by the presence or absence of the antigens A and B, which are carried on the surface of the red cells. Persons may thus have type A, type B, type O, or type AB blood.
4.healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.
5.Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body. ... Blood without oxygen returns through the veins, to the right side of your heart.
6.To help prevent heart disease, you can:
Eat healthy.
Get active.
Stay at a healthy weight.
Quit smoking and stay away from secondhand smoke.
Control your cholesterol and blood pressure.
Drink alcohol only in moderation.
Manage stress.